Answer:
Single User/ Single Tasking Operating System
Answer:
Process
Explanation:
In older systems, the user interface mainly consisted of process-control screens that allowed a user to send commands to the system. These systems were used in a great variety of industries, and it gave the user control over process measurements or process variables. It also allowed the user to view the current state of the process, modify the operation of the process, and perform other related actions.
CPU (Central Processing Unit) is also known as the brain of the computer because this is the place which actually runs the programs. The programs are the set of instructions needed to perform a task.
